Home / 1,327.52-1,989.60-1,111.52

Finding the Fourth Proportional to 1,327.52, 1,989.60 and 1,111.52

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Solution

The fourth proportional to 1,327.52, 1,989.60 and 1,111.52 is: 1,665.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.52 : 1,989.60 = 1,111.52 : x
  2. Step 2: Convert to fraction form
    1,327.52/1,989.60 = 1,111.52/x
  3. Step 3: Cross multiply
    1,327.52x = 1,989.60 × 1,111.52
  4. Step 4: Simplify right side
    1,327.52x = 2,211,480.19
  5. Step 5: Solve for x
    x = 2,211,480.19/1,327.52
  6. Step 6: Final answer
    x = 1,665.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.